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To all whom it may concern tnfted' Stains tutti clyllw.

BRADFORD BUCKLAN D, 0F PLANTSVILLE, CONNECTICUT, ASSIGNOR TO S. STOW MAN- UFACTURING COMPANY, OF SAME PLACE.

Letters Patent No. 91,209, dated June 15,1869.

IMPROVEMENT IN TINSMITHS' MACHINE.

The Schedule referred to in these Lettere Patent and making part of the same.

Be it, knownvthat I, BRADFonD'BUcKLAND, of Plantsville, in thecounty of Hartford, and State of Connecticut, have 4invented certain new and useful Improvements in Tinsmiths Machines; and I do heredeclare that the following `is a full, clear, and exact description thereof, which' will enable those skilled in -the art to make and use the same, reference being hjadto the accompanying drawing, making a part of this specification, which drawing is a vertical and 1on- 'gi'tudinal section of my invention. Y My invention is designed asan improvement on a tinsmiths machine patented by O. W.- Stow, Novem- Vber 12, 1867; and consists in the peculiar arrangement for the endwise adjustment of the upper shaft,

as hereinafter fullydescribed. p

'The machine patented by Stow has been manufactured in duplicate parts, Vso that when one ofthe parts shall fail, a duplicate of the same can be readily substituted in its place.

Inthe saidpatent of Stow, the endwise adjustment ofthe upper shaft was eifccted by arotary screw-bearing, screwed directly into a rocker-shaft. It has been somewhat difficult to'always thread the inside of the rocker-shaft, so as to insure a good t of the duplicate ofthe rotary screw-bearing.

To produce the same adjustment ot the upper shaft in a much less expensive manner, and by parts that .are easily duplicated, is the object and result of my invention.

The machine shown in the drawing is what is termed aV tinsmiths anging` machine. My improvement is equally applicable to any of the' machines of like character in which Stows patent isapplicable.

. The rocker-.bearing or shaft K is fitted to swing,r or

` rock in the frame, on pivots orjournals, the position of which is indicated by the brokenV circle, and also shown and described in Stows patent.

I dispense with the set-nut and rotary screw-bearing employed by Stow, and make the rear bearing for the shaft C directly in the rocker-bearing or shaft K.

On the front or inside of the rocker-shaft K, I form alsuitable annular recess, o.-

, Around the shaft C, I place a spiral spring, s, one end of which spring'bears against the gear-wheel E, and the other end rests in the annular recess o, and bears against the washer r or directly against the rocker-shaft K, as desired.

With the exception of the rocker-shaft K, recess o, spring s, `and washer 1', the machine is substantially the same as shown and described in Stows patent.

When this machine, or any of the same class of tinsmithsl machines, is used, all the endwise pressure or vpower exerted on the upper shaft C has a tendency tol throw the'shaft forward. Itis therefore only necessary to keep the shaft C forward, so that when the Hanging roller A is brought in contact with the lower roller B, the same shall meet each other in their proper positions.

The arrangement of the spring s, as shown, is all that is necessary or desirable to hold the shaft C foryward, while its backward 'movement can be adjusted Witnesses:

` JAMES SHEPARD,

W. R.. WALKLEY. 

